Thermostat



Oct. 5 1926. 1,602,352

T. J. FOLEY THERMOSTAT Filed Jan. 13, 1926 v 2 Sheets-Sheet l PatentedOct. 5, 1926.

UNITED STA T'ES PATENT OFFICE.

THOMAS-T. FOLEY OF KANSAS CITY, MISSOURI.

THERMOSTAT.

Application flea January 13, 192a Serial No. 81,016.

This invention relates to a thermostat, the

' combination and arrangement of the several parts, to be hereinafterfully described, illustrated 'in the accompanying drawings andspecifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters deno te.

like or corresponding parts throughout 'the several views, and in whichFigure 1 is a view partly in section; showing the invention in use. v

Figure 2 is an enlarged sectional view through one form of the gascontrolling means. t

Figure 3 is a sectional view through the 'tube arranged in the tank forcarrying the expansible material. I x

Figure 4 is a' section on line 4-4 of Figure 2. v V

Figure 5 is a sectional viewithrough another form of gas controllingmeans.

, Referring to Figure 1, the water tank is shown at 1 and the coil isshown at 2, the.

Y coilbeing connected with the tank by the terminals 3. The housing forthe coil is shown at4 and the burner 5,for the housing is provided witha pilot burner 6 which isconnected by the pipe 7 with the gas supplypipe 8. This supply pipe is incommunication with a chamber 9 formed .ina casing .10 by a partition 11 and the chamher is connected with theburner by the telescopic pipes 12, so that the gas must pass through thechamber to reach the burner. A valve 13 engages the top of the pipe 8and the stem 14'of said valve passes through a hole in the partition 11and has a plate 15 on its upper end which is engaged by a coiled spring16 on the stem and arto that before described.

1 'What I claim is 2- ranged between the partition 11 and the plate.This spring tends to hold the valve in open position so'that. gas canpass to the burner. An expansible member 17 of disk shape is held to thecover 18 of the casing lO'by the nipple 19 and said member engages'theplate 15 so that when said memher is expanded, it presses upon the plate15 and thus push-es the stem 14 downwardly to force the valve 13 uponits seat and thus shut off the passage of gas to the burner. A tube 20pro ects into the tank 1 and is car ried by a nipple 21 threaded in thetank and provided with a packing gland22. A small tube 23 has one endconnected with the outer end of the tube 20 by the plug 24 and its otherend is connected with the nipple 19.

The tube 20 and the parts connected there-' with are adapted to containexpansible ma terial which, when acted upon by heat, will. expand andthus cause the member 17 to expand, which will act upon the stem andvalve to close the valve and thus shut off the supply of gas'to theburner. When the water cools in the tank, the material will contract sothat the spring 16 will be petmitted by the mernberl? to open the. valveso that the. burner will start up again, and

in this way the temperature of the water in the boiler will remainconstant.

Figure 5 shows a slight. modification in which the member 17 is made ofbellows shape instead of diskshape. In other respects, this form of theinvention is similar.

It is thought from the foregoing description that the advantages andnovel features of m invention will be readily apparent. I diesire it tobe understood that I may make changes in the construction and in thecombination and arrangement of the several parts, provided that suchchanges fall within the scope of the In combination with a boiler andits heater, a casing having a partition therein dithe casing into anupper and lower viding cham r means for connecting the lower cham erwith the gas supply and with the burner, a valve in the chamber forcontrolling the flow of gas therethrough, a stern connected with thevalve and passing appended claim.

through the partition, a diskon the upper end of the stem, a spring onthe stem be tween the disk and partition acting'to hold the valve olfits seat, an expansible member forming a chamber arranged in the upper'chamber of the casing and having its lower end engaging the disk, anipple connected with the upper end of the expansible menu her andpassing through the top of the easing, a tube projecting into the boilerand containing expansible material anda pipe THOMAS J. FOLEY.

